aws-serverless-fastify

AWS-SERVERLESS-FASTIFY

Description

A port of the AWSLABS aws-serverless-express library tailor made for the Fastify web framework. Inspired by wanting to use the Fastify gracefully in Nest projects with Lambda. Plus it's called Fastify, how cool is that!

Nest Compatibility

Version 1.x compatible with nestjs 7.x and Fastify 2.x Version 2.x compatible with nestjs 8.x and Fastify 3.x Version 3.x compatible with nestjs 9.x and Fastify 4.x

Installation

$ npm install aws-serverless-fastify

Examples

Nest

Nest example is provided here. Below is the summary.

lambda-entrypoint.ts (I think the lambda-entrypoint.ts is much cleaner than what is proposed by Fastify)

import {
  Context,
  APIGatewayProxyEvent,
  APIGatewayProxyResult,
} from 'aws-lambda';
import { bootstrap } from './app';
import * as fastify from 'fastify';
import { proxy } from 'aws-serverless-fastify';

let fastifyServer: fastify.FastifyInstance;

export const handler = async (
  event: APIGatewayProxyEvent,
  context: Context,
): Promise<APIGatewayProxyResult> => {
  if (!fastifyServer) {
    fastifyServer = await bootstrap();
  }
  return await proxy(fastifyServer, event, context);
};

app.ts (Setup the application once in app.ts)

import { NestFactory } from '@nestjs/core';
import { AppModule } from './app.module';
import {
  FastifyAdapter,
  NestFastifyApplication,
} from '@nestjs/platform-fastify';
import * as fastify from 'fastify';

export async function bootstrap(): Promise<fastify.FastifyInstance> {
  const serverOptions: fastify.ServerOptionsAsHttp = {
    logger: true,
  };
  const instance: fastify.FastifyInstance = fastify(serverOptions);
  const nestApp = await NestFactory.create<NestFastifyApplication>(
    AppModule,
    new FastifyAdapter(instance),
  );
  nestApp.setGlobalPrefix('api');
  nestApp.enableCors();
  await nestApp.init();
  return instance;
}

main.ts (Will still serve to run the Nest App locally)

import { bootstrap } from './app';

async function startLocal() {
  const fastifyInstance = await bootstrap();
  fastifyInstance.listen(3000);
}

startLocal();

Performance

Not meant to be exhaustive by any means but here are some basic load tests comparisons through API Gateway via Artillery. aws-serverless-fastify versus aws-serverless-express

Support

Pull Requests are welcome! We just thought this was a cool idea to simplify! Important: Commits should follow Angluar conventional-changelog format :)

Stay in touch

• Author - Benjamin Main

License

aws-serverless-fastify is MIT licensed.